经股动脉行介入诊疗术后股动脉止血贴的应用

目的观察经股动脉行介入诊疗术后股动脉穿刺点应用股动脉止血贴（V＋PAD）的临床效果。方法应用随机排列表随机入选８０例行冠状动脉介入诊疗的患者，其中偶数应用止血贴共４０例作为试验组，奇数应用徒手压迫不使用止血贴共４０例作为对照组。所有患者均签订知情同意书。观察两组的按压时间、止血后穿刺点的处理、患者卧床姿势、下床活动时间、患者的舒适度、出院前穿刺点并发症情况。结果两组患者年龄、性别构成比、激活凝血时间和血压差异均无统计学意义（P＜０．０５），但试验组和对照组的压迫时间分别为（７．９±０．５）min和（１９．８±５．１）min，卧床时间分别为（６．１±５．０）h和（２３．９±０．２）h，两组间差异均有统计学意义（P值均＜０．０１）。试验组所有患者在拔管后即刻均采用床头抬高３０°卧位，１h后将床头抬高９０°，常压包扎，不制动，所有患者舒适度明显提高。试验组有１例比较肥胖的女性发生假性动脉瘤，其余入选患者在住院期间均未出现穿刺处并发症。结论股动脉止血贴止血迅速，效果确切，患者舒适度明显提高，减轻了医护人员的工作量，可以在临床大规模推广应用。

Numerical Simulation of Combustion and Fluid-solid Coupled Heat Transfer on the Aluminum Reverberatory Holding Furnace

To predict three-dimensional temperature distribution of molten aluminum in premixed combustion inside the industrial aluminum holding reverb furnace, fluid-solid coupled method was present. Variable flow field heat transferring was adopted. Two influencing factors for temperature distribution offurnace were calculated and analyzed： temperature ofcombustion air and excess air ratio. The results show that the calculated results are agreement with the experimental data under the standard condition; increasing the temperature of combustion air and excess air ratio are the feasible and effective to improve the average temperature of molten aluminum, since the average temperature of the molten aluminum increases 0.3 ℃ when the temperature of combustion air increases 1℃, and the optimal excess air ratio is about 1.25. Adopting high temperature of combustion air and relative large excess air ratio is an appropriate combustion mode for the furnace.